基于TRNSYS仿真的不同跟踪方式下CPV/T系统的热电性能及经济性分析

STUDY ON ANNUAL ELECTRICAL/THERMAL PERFORMANCE AND ECONOMIC ANALYSIS OF CPV/T SYSTEMS BASED ON TRNSYS SIMULATION

利用TRNSYS软件仿真预测了采用不同跟踪方式的聚光光伏光热(CPV/T)系统在西安、兰州和拉萨这3个地区的全年热、电性能。仿真结果显示,以西安为例,3种跟踪方式中,采用双轴跟踪方式的CPV/T系统的全年热、电效率均最高,分别为40%和11.34%;采用单轴东西向跟踪方式的CPV/T系统的全年热、电效率次之,分别为35.67%和10.74%;采用单轴南北向跟踪方式的CPV/T系统的全年热、电效率均最低,分别为32.19%和10.16%。从动态投资回收期的角度对采用不同跟踪方式的CPV/T系统的经济性进行了评价,计算结果表明,采用单轴东西向跟踪方式的CPV/T系统的经济性最佳,在西安、兰州和拉萨这3个地区,其动态投资回收期分别为4.84、4.93和4.81年;采用双轴跟踪方式的CPV/T系统的经济性次之,在上述3个地区其动态投资回收期分别为5.65、5.69和5.48年;采用单轴南北向跟踪方式的CPV/T系统的经济性最差,在上述3个地区其动态投资回收期分别为6.09、6.26和6.00年。

The annual thermal and electrical performance of the concentrating PV/thermal(CPV/T)system with different tracking methods in Xi’an,Lanzhou and Lhasa is predicted using TRNSYS simulation.Taking systems in Xi’an as an example,the simulation results show that dual-axis tracking CPV/T system has the highest annual thermal efficiency of 40%and the highest electrical efficiency of 11.34%.The single-axis east-west tracking CPV/T system has the second highest annual thermal efficiency of 35.67%and electrical efficiency of 10.74%.The single-axis north-south tracking CPV/T system has obtained the lowest thermal efficiency of 32.19%and electrical efficiency of 10.16%.At the same time,the dynamic investment payback period is used to evaluate the economics of different tracking methods of CPV/T systems.The results show that single-axis east-west tracking CPV/T system is the most economy system,that dynamic investment payback periods of the three areas of Xi’an,Lanzhou and Lhasa are 4.84,4.93 and 4.81 years,respectively.Dual-axis tracking CPV/T system is the second in economy,that dynamic investment payback periods in the above three areas are 5.65,5.69 and 5.48 years,respectively.Single-axis north-south tracking system has the worst economy,that dynamic investment payback periods of the three areas are 6.09,6.26 and 6.00 years,respectively.